Karlgaard talks about his conversion to his "mostly vegan" diet last year after feeling overweight and out-of-shape. He even goes as far as providing a sample menu of what his diet looked like. After losing 30 lbs, Karlgaard says:

"The result of this new, mostly vegan diet, combined with biking, has been impressive. The vegan-like diet works superbly as a way to recover from heavy anaerobic workouts. I now weigh 168 pounds and feel terrific. The vegan fans are right about this: You do feel cleaner inside."